"You may not enter Creo Simulate with this model."

Hello All,

I'm trying to test a certain part, but everytime I try to start Creo Simulate, a pop-up will occur that says, "This model failed to regenerate. You may not enter Creo Simulate with this model."  I have checked the part and there are no error features or issues.  I would appreciate any suggestions or help.

Thank you.

-Todd